Epson FX-80 Specifications Page 194
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Figure
13-5.
Plotting a circle
Circle Plotting
You can have your program examine the cells of an array in any
order; the following program scans them row by row, using two
loops:
20 FOR R=l TO N: FOR C=l TO N
At each cell, line 30 calculates the cell’s distance from a center point by
using the distance formula:
30
D=SQR((R-11)^2+(C-11>^2)
Next the program compares this distance with a number
(10)
that
specifies the radius of a circle. Notice that this formula commonly
results in a number that includes a decimal fraction, e.g.,
8.94.
If the distance for the current cell A(R,C) is close to 10, you set its
contents equal to one: otherwise, you leave it alone.
40
IF INT(D+.0)=l0 THEN A(R,C)=l
Line
40
sets any cell whose distance is between
9.5
and 10.5 equal
to one.
177
- FCC COMPLIANCE STATEMENT 2
- FOR AMERICAN USERS 2
- Torrance, California 90505 2
- PR#1 and 4
- 39 FOR D=1 TO 17 4
- LPRINT CHR$(27);CHR$(52) 4
- Contents 7
- List of Figures 13
- List of Tables 17
- Introduction 18
- Inside the Printer 19
- Inside This Manual 19
- Programmer’s Easy Lesson 24
- Ticket Program 25
- Ticket Program Description 27
- 350-410 29
- Chapter 1 30
- The FX Printers 30
- Figure 1-2. Printer parts 32
- Printer Location 33
- Printer Preparation 34
- Paper separator 34
- FX-100) 35
- Manual-feed knob 36
- DIP switches 37
- Figure 1-8. DIP switch vent 38
- Switch 1 40
- Ribbon installation 40
- Paper Loading 41
- FX-80: built-in tractor feed 41
- Figure 1-11. Ribbon insertion 42
- (optional on the FX-80) 46
- Figure 1-17. Hook and stud 47
- Top-of-form position 49
- Paper-thickness lever 49
- Paper thickness adjustment 51
- Control panel 52
- The FX tests itself 52
- 136 columns. Turn the printer 53
- Chapter 2 54
- BASIC and the Printer 54
- BASIC Communications 55
- Character strings 56
- 10 PRINT CHR$(65) 56
- 10 PRINT CHR$(193) 56
- BASIC print commands 56
- ASCII and BASIC basics 57
- Control codes 58
- FX interpretation 59
- ITALIC CHARACTER SET 60
- Change Commands 61
- DELete and CANcel 63
- Chapter 3 66
- Print Pitches 66
- Main columns 67
- Intermediate positions 68
- Modes for Pitches 69
- Compressed Mode 70
- CHR$(15)" 71
- Mode priorities 72
- Pitch Mode Combinations 73
- COMPRESSED 75
- AND ELITE 75
- YOU CAN MIX: PICA EXPANDED 76
- CHARACTERS ON THE SAME LINE 76
- CHR$(20) 77
- Chapter 4 78
- Print Quality 78
- Emphasized Mode 79
- CLASS" 79
- LPRINT CHR$(27)"@" 79
- Mixing Modes 82
- ON" 83
- Type of mode 84
- Mode name 84
- Chapter 5 86
- Italic Mode 89
- More Mode Combinations 90
- Emphasized 93
- Compressed 93
- Special Printing Features 98
- Unidirectional Mode 100
- CHR$(27) 101
- CHR$(27)”<” 101
- International Characters 102
- Special Speeds 105
- CHR$(27)“il” 106
- 5 = Sweden 107
- 2 = Germany 107
- Line Spacing and Line Feeds 110
- Chapter 7 110
- Variable line spacing 112
- FOR X=0 TO 4 114
- STEPS" 114
- Line Feeds 115
- One-time, immediate line feed 116
- Reverse feed (FX-80 only) 116
- 20 LPRINT 118
- Line-spacing commands 119
- Chapter 8 120
- Forms Control 120
- LPRINT CHR$(12); 121
- Paper Perforation Skip 124
- Single-Sheet Adjustment 126
- CHR$(27)"9" 128
- Chapter 9 130
- Margins and Tabs 130
- LPRINT CHR$ ( 132
- FX-100 133
- Both margins 135
- CHR$(27)"@"--' 135
- 16, 24, 32 136
- FOR J=l TO 137
- 80 LPRINT H$;J; 137
- 90 NEXT J: LPRINT 137
- Variable horizontal tabs 138
- ,)CHR$(O) 138
- LPRINT CHR$(15); 139
- Vertical tab usage 139
- Ordinary vertical tabs 140
- Vertical tab channels 143
- CHR$(11) 146
- Chapter 148
- Introduction to Dot Graphics 148
- Print Head 149
- Graphics Mode 151
- Pin Labels 152
- First Graphics Programs 154
- CHR$(27)“K” 159
- Varieties of Graphics Density 160
- Density Varieties 162
- SINGLE-DENSITY GRAPHICS 163
- B$=CHR$(127)+CHR$(42) 164
- QUADRUPLE-DENSITY GRAPHICS 166
- MODE # 0 167
- MODE # 3 167
- MODE # 6 167
- One-to-one 168
- (plotter) 168
- Second byte 170
- Pin Combination Patterns 171
- Chapter 12 176
- Design Your Own Graphics 176
- STRATA Program 177
- READ P,R: FOR J=l TO -N: 178
- Three-Dimensional Program 180
- Figure 72-6. Program 186
- Figure 12-7. FX-100 figure 186
- CHR$(32)CHR$(64); 187
- Reversed version 189
- Chapter 13 190
- Plotter Graphics 190
- Circle Plotting 194
- Chapter 14 206
- Symmetrical Graphics Patterns 206
- Pin Pattern Calculation 209
- Graphics Width Settings 210
- Pattern Printout 210
- Figure 14-3. Program 211
- SYMMETRY 211
- Variations 212
- 20 MAX=64: MIN=l: RE=l: N=1/2 213
- Chapter 15 216
- User-Defined Characters 216
- Preparation 217
- Character Definition 217
- Dots into DATA 219
- FOR X=1 TO 11: READ C: 219
- LPRINT CHR$(C);: NEXT X 219
- 1170 DATA 219
- ' My E 219
- Proportional print 220
- Attribute byte 220
- Downloading Command 224
- Defining More Characters 224
- Redefining Control Codes 225
- Mode Strings 228
- 12345678SOFTWARE 229
- Chapter 16 232
- Large Letters: Double High 234
- FOR W=l TO 238
- READ L: PRINT CHR$(L) 238
- NEXT Z: NEXT Y: NEXT W 238
- GAMES SEEM SAME 239
- Core Sets 240
- Line Graphics 242
- Chapter 17 244
- Business Applications 244
- Statement Form 248
- Program 251
- STATEMENT 251
- 999 REM: The End 255
- 113-116, 118 263
- ON LINE light and button, 35 264
- 16,324, 328 265
- 38, 40, 314-315 265
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